215729594089 has 3 divisors (see below), whose sum is σ = 215730058557. Its totient is φ = 215729129622.

The previous prime is 215729594039. The next prime is 215729594149. The reversal of 215729594089 is 980495927512.

The square root of 215729594089 is 464467.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 215729594089 - 2¹¹ = 215729592041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215729594039) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 232234 + ... + 696700.

It is an arithmetic number, because the mean of its divisors is an integer number (71910019519).

Almost surely, 2^215729594089 is an apocalyptic number.

215729594089 is the 464467-th square number.

215729594089 is the 232234-th centered octagonal number.

It is an amenable number.

215729594089 is a deficient number, since it is larger than the sum of its proper divisors (464468).

215729594089 is an frugal number, since it uses more digits than its factorization.

215729594089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928934 (or 464467 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 61.

The spelling of 215729594089 in words is "two hundred fifteen billion, seven hundred twenty-nine million, five hundred ninety-four thousand, eighty-nine".